VAAI (vStorage APIs for Array Integration) for both block and NFS storage
Aside from VAAI support for block storage iSCSI and Fibre volumes, proNAS 3.0 also supports VAAI for NAS (NFS) to greatly improve VM performance. With VAAI support, VMs have great operation performance by offloading cycles from ESXi to storage and storage can be further effectively utilized by VMs.

3 nodes High Availability cluster
proNAS 3.0 offers up to 3 nodes active/active high-availability service for storage which ensures no service down time when any NAS server failed.

Thin Provisioning for file and block level volumes
All volumes can be configured with thin provisioning to optimize storage capacity and further reduce cost.